Mostly your MAF MASS AIR FLOW SENSOR needs cleaning.
1st Disconnect the battery ground cable
then open the engine air cleaner.
As shown
then follow the steps in the video.
HOW TO CLEAN A MASS AIR FLOW SENSOR
if that did not clear your engine chocking then make sure there is no Vacume leak.
hope that helps
SOURCE: 1997 ford e 350 v-10 stutters when accelerating. Smooth otherwis
Water jackets pretty tight on heads. Replacing engine right now for this problem on customer work van. Pull plugs and look for any cylinders with antifreeze in them. This truck had 250k and same problem.
SOURCE: 2000 ford excursion v10 driving down the road
Honestly you should send it into the dealer. I don't think guessing will help you. Typically it is a dirty connection into the steering column (behind the ignition key) But diagnostics need to be run and a look at the VSS system (through a good scan tool) is needed to confirm.
SOURCE: My 1998 ford expedition reverses only sometimes.
It can be all of the above until a technicain troubleshoots it.
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